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The units dispose of condensate through a 3/4 in. NPT female

fitting that exits on the compressor end of the unit. Condensate

water can be drained directly onto the roof in rooftop installations

(where permitted) or onto a gravel apron in ground level installa-

tions. Install a field-supplied condensate trap at end of condensate

connection to ensure proper drainage. Make sure that the outlet of

the trap is at least 1 in. lower than the drain-pan condensate

connection to prevent the pan from overflowing. Prime the trap

with water. When using a gravel apron, make sure it slopes away

from the unit.

If the installation requires draining the condensate water away

from the unit, install a field-supplied 2 -in. trap at the condensate

connection to ensure proper drainage. Condensate trap is available

as an accessory or is field-supplied. Make sure that the outlet of the

trap is at least 1 in. lower than the unit drain-pan condensate

connection to prevent the pan from overflowing. Connect a drain

trough using a minimum of field-supplied 3/4 -in. PVC or

field-supplied 3/4 -in. copper pipe at outlet end of the 2 -in. trap

(See Fig. 11). Do not undersize the tube. Pitch the drain trough

downward at a slope of at least 1 in. every 10 ft of horizontal run.

Be sure to check the drain trough for leaks. Prime the trap at the

beginning of the cooling season start-up.

Step 7—Install Electrical Connections

The unit cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility of personal

injury if an electrical fault should occur. This ground may

consist of an electrical wire connected to the unit ground lug

in the control compartment, or conduit approved for electrical

ground when installed in accordance with NEC, ANSI/NFPA

American National Standards Institute/National Fire Protec-

tion Association (latest edition) (in Canada, Canadian Elec-

trical Code CSA C22.1) and local electrical codes. Failure to

adhere to this warning could result in serious injury or death.

Failure to follow these precautions could result in damage to

the unit being installed:

1. Make all electrical connections in accordance with NEC

ANSI/NFPA (latest edition) and local electrical codes

governing such wiring. In Canada, all electrical connec-

tions must be in accordance with CSA standard C22.1

Canadian Electrical Code Part 1 and applicable local

codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between

field-supplied electrical disconnect switch and unit. DO

NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within operating

voltage range indicated on unit rating plate. On 3-phase

units, ensure phases are balanced within 2%. Consult local

power company for correction of improper voltage and/or

phase imbalance.

4. Insulate low-voltage wires for highest voltage contained

within conduit when low-voltage control wires are in same

conduit as high-voltage wires.

5. Do not damage internal components when drilling through

any panel to mount electrical hardware, conduit, etc.

HIGH-VOLTAGE CONNECTIONS — The unit must have a

separate electrical service with a field-supplied, waterproof dis-

connect switch mounted at, or within sight from the unit. Refer to

the unit rating plate, NEC and local codes for maximum

fuse/circuit breaker size and minimum circuit amps (ampacity) for

wire sizing (See Tables 3A and 3B for electrical data).

The field-supplied disconnect may be mounted on the unit over the

high-voltage inlet hole (See Figs. 2-3).

If the unit has an electric heater, a second disconnect may be

required. Consult the Installation, Start-Up and Service Instruc-

tions provided with the accessory for electrical service connec-

tions.

Operation of unit on improper line voltage constitutes abuse and

may cause unit damage that could affect warranty.

ROUTING POWER LEADS INTO UNIT — Use only copper

wire between disconnect and unit. The high-voltage leads should

Fig. 9—Typical Installation

C99061

INDOOR

THERMOSTAT

DISCONNECT

PER NEC

FROM

POWER

SOURCE

RETURN

AIR

TOP COVER

Fig. 10—50JX with Duct Covers On

(Unit shown with optional louvered grille)

C99030

Accessory Duct Covers

Fig. 11—Condensate Trap

C99013

1” MIN.

2” MIN.

TRAP

OUTLET

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 27 28

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